ahhhh should i stroke my LQ4?? opinions??
09-30-2009, 02:28 AM
#1
ahhhh should i stroke my LQ4?? opinions?? guys, i just got my LQ motor, and im definitely doing:
forged rods/pistons
ARP head and main studs
edelbrock lingenfelter CNC'd heads
i have the "ebay" PTK kit with a 76mm 81 a/r housing turbo.
i can pick up a basically new eagle 4" crank for $450
so honestly, would it benefit me to just stroke it to a 402 or would that mean more hassle? (bigger turbo? better hot side? etc.)
this is for a STREET car. who cares about my 1/4mile times. I live in so cal and there are no tracks. i just want a car that kills everything else at a red light.
so what would the pros/cons of stroking this motor be??
forged rods/pistons
ARP head and main studs
edelbrock lingenfelter CNC'd heads
i have the "ebay" PTK kit with a 76mm 81 a/r housing turbo.
i can pick up a basically new eagle 4" crank for $450
so honestly, would it benefit me to just stroke it to a 402 or would that mean more hassle? (bigger turbo? better hot side? etc.)
this is for a STREET car. who cares about my 1/4mile times. I live in so cal and there are no tracks. i just want a car that kills everything else at a red light.
so what would the pros/cons of stroking this motor be??
09-30-2009, 02:34 AM
#2
with that ar and that small of a turbo i would stick with the stock crank. That ar may be small for a 364 LQ4 IMO. if you had a 402 you might spool the turbo on idle. It would be great for smokey burnout shows and short runs but would probably not support a 402 over 5 or 6k rpms.
on another note I'll take the crank for 450 :-)
on another note I'll take the crank for 450 :-)
10-01-2009, 01:02 AM
#4
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Thats a little small of a turbo for the 408, im running stock cubes and an GT-88, but im going to be pushing around 20psi. Id say leave the stock cubes and go at it with the same turbo you have.
10-01-2009, 11:44 PM
#6
I say go for the 408 and a monster 91mm turbo if thats not a problem. Since your kit probably comes with a t4 flange the biggest you may be able to go is a 88mm turbo which would still be bad ***.
Matching the turbo is important because to small and you have a stump pulling truck motor(alot of low end instant tq and hp but no top end), and to big you only have an all out drag motor(spools to slow and almost has no use on the street).
10-02-2009, 01:43 AM
#7
theres no cons really. the only con would be not having a turbo that matches your cubes.
I say go for the 408 and a monster 91mm turbo if thats not a problem. Since your kit probably comes with a t4 flange the biggest you may be able to go is a 88mm turbo which would still be bad ***.
Matching the turbo is important because to small and you have a stump pulling truck motor(alot of low end instant tq and hp but no top end), and to big you only have an all out drag motor(spools to slow and almost has no use on the street).
I say go for the 408 and a monster 91mm turbo if thats not a problem. Since your kit probably comes with a t4 flange the biggest you may be able to go is a 88mm turbo which would still be bad ***.
Matching the turbo is important because to small and you have a stump pulling truck motor(alot of low end instant tq and hp but no top end), and to big you only have an all out drag motor(spools to slow and almost has no use on the street).
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10-02-2009, 11:18 AM
#8
you know the old saying, "theres no replacement for displacent" is really stuck in my head right now... i think im going to do it, and stick with the 76mm just to see how it runs.. and if its chocking out, ill get a new one. if it doesnt choke out, but spools at 800 rpm, even better
10-02-2009, 10:58 PM
#11
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10-03-2009, 07:27 PM
#15
It's actually piston rock at the bottom of the stroke. The piston comes so far out of the bottom of the bore coupled with the tapper of the piston can cause the piston to rock, beat up the skirts and drink oil. There has been lots of debate about this and many of the engine builders will tell you that they have built thousands of 4" stroke setups without issue. It's hard to argue with that but I have personally seen it twice with my stroker motors and I wont use a 4" stroke again.
10-05-2009, 06:07 PM
#18
how does that sound? 